KR20150048305A - Freezer alarm system - Google Patents

Abstract

According to an embodiment of the present invention, a freezer alarm system is provided. According to an embodiment of the present invention, a freezer alarm system comprises: a heat detection sensor placed inside a freezer and detecting human body heat; a control unit generating an alarm signal by determining whether there is a person through information of the human body heat measured from the heat detection sensor; an alarm unit provided with an alarm signal from the control unit to output an alarm and a warning light inside the freezer; and an inlet unit placed inside the freezer and providing an output stop signal which stops an output of the alarm and the warning light of the control unit.

Description

Freezer alarm system [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a freezer alarm system, and more particularly, to a freezer alarm system that can recognize whether a worker is confined to the freezer regardless of a conscious state of a worker trapped in the freezer.

In general, articles requiring low temperature storage such as food ingredients are stored inside the freezer. The operator opens the door to open and close the door at the time of internal work or entrance and exit work, and closes the door to prevent the loss of energy due to the loss of the product due to the cold loss and the operation of the freezer. However, when the door is closed, the worker often gets trapped inside the freezer, and in order to prevent this, the freezer is provided with an alarm device. The alarm system is used for the operator who is confined inside the freezer to ask for the structure outside. The operator presses the button located inside the freezer and informs whether the door is locked or not.

However, the conventional freezer alarm system can be operated only when the operator who is confined in the freezer has consciousness. If the operator suddenly loses consciousness, the freezer alarm system can not inform the outside of the system of confinement.

SUMMARY OF THE INVENTION The present invention provides a freezer alarm system capable of recognizing and restraining a worker from the outside regardless of a conscious state of a worker trapped in the freezer.

The technical objects of the present invention are not limited to the technical matters mentioned above, and other technical subjects not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a freezer alarm apparatus comprising: a heat sensing sensor disposed in a freezer and sensing a heat of a human body; An alarm unit receiving the alarm signal from the control unit to output audible or intense light to the inside of the freezer compartment and an alarm unit located in the freezer and for outputting the audible or intense light to the control unit And an input for providing an output interruption signal to interrupt.

The thermal sensor is an infrared camera that senses infrared rays to generate a thermal image, and the controller can determine the presence or absence of a person from the thermal image.

Wherein the thermal imaging camera generates a plurality of thermal image images with a time lag, the control unit extracts a body temperature estimation region from the plurality of thermal image images, and makes a time difference from the body temperature estimation region of the first generated thermal image region The temperature of the body temperature estimation region of the generated thermal image may be compared to determine whether the body temperature is lowered, and the alarm signal may be generated.

The controller may generate the alarm signal by increasing the intensity of the alarm signal when a body temperature lower than a reference value is sensed and a body temperature lower than a reference value is sensed.

Wherein the thermal imaging camera generates a plurality of thermal image images with a time lag, and the control unit extracts a body temperature estimation region from the plurality of thermal image images, and compares the position of the body temperature estimation region extracted from the plurality of thermal image images To determine whether a person is moving, and to generate the alarm signal in stages according to the degree of movement of a person.

The controller may generate the alarm signal by increasing the intensity of the alarm signal when the motion of the person is not detected.

The controller may generate the alarm signal when a predetermined time elapses when a person is detected from the heat sensor.

Further comprising an external alarm unit for receiving the alarm signal from the control unit and outputting an audible or a light signal to the outside of the freezer, wherein the control unit is operable to transmit the alarm signal to the external alarm unit when the output stop signal is not provided from the input unit .

The input unit may be formed of at least one of a pressure method for pressing and operating by a person and a voice recognition method for generating a signal by recognizing a human voice.

According to the present invention, the presence of a person in the freezer can be determined by providing a heat sensing sensor for sensing the heat of the human body in the freezer, and thus audible or light can be output to the inside and the outside of the freezer. Therefore, regardless of the conscious state of the worker trapped in the freezer, it is possible to recognize from the outside whether or not the worker is confined, and thus the worker can be rescued.

1 is a block diagram illustrating a configuration of a freezer alarm system according to an embodiment of the present invention.
FIG. 2 is a schematic view illustrating a freezer alarm system of FIG. 1 installed in a freezer.
3 is a diagram for explaining the temperature change of the body temperature estimation region extracted from the thermographic image.
Figs. 4 and 5 are views for explaining a change in the position of the body-temperature estimation region extracted from the thermal image. Fig.
6 is a flowchart for explaining the operation of the freezer alarm system of FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Hereinafter, a freezer alarm system according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 6. FIG.

The freezer alarm system 1 according to an embodiment of the present invention is installed in the freezer 100 maintained at a low temperature state. In order to prevent an operator from being trapped inside the freezer 100, Of the detainee. The freezer alarm system 1 is provided with a heat sensing sensor 10 for sensing the heat inside the freezer 100 to determine the presence or absence of an operator in the freezer 100, Light can be output. Therefore, regardless of the state of consciousness of the worker trapped in the freezer 100, it is possible to recognize from the outside whether the worker is confined or not, so that the worker can be safely rescued.

Hereinafter, the freezer alarm system 1 will be described in detail with reference to Figs. 1 to 5. Fig.

FIG. 1 is a block diagram illustrating a configuration of a freezer alarm system according to an embodiment of the present invention. FIG. 2 is a schematic view illustrating a freezer alarm system of FIG. 1 installed in a freezer, FIGS. 4 and 5 are views for explaining a change in the temperature of the body-temperature estimation region extracted from the radiographic image. FIG.

A freezer alarm system 1 according to the present invention includes a heat sensing sensor 10 for sensing heat, a control unit 20 for generating an alarm signal A, an alarm unit 30 for outputting a percussion or light signal, And an input unit 40 for stopping the output of the control unit 30.

The heat sensing sensor 10 is a sensor that senses heat radiated from the human body, that is, the human body, and is located inside the freezer 100. [ A plurality of heat sensing sensors 10 may be installed in the freezer 100 and a plurality of thermal sensors 10 may be disposed at the corners of the freezer 100, respectively. By arranging the plurality of thermal sensors 10 at the corners, the dead zone can be minimized, and heat can be sensed at all positions in the freezer 100 without any leakage.

The thermal sensor 10 may be formed of a thermal camera that senses infrared rays to generate an infrared image I, and the infrared camera uses a principle of emitting infrared rays of a corresponding wavelength according to temperature, (I). An infrared ray means an electromagnetic wave having a wavelength in the range of 0.7 to 1000 μm which is longer than the visible light ray and shorter than the micro ray, and has a characteristic similar to that of a real image, so that the infrared image I can be easily generated. The thermal sensor 10 transmits the generated thermal image I to the controller 20. [

The controller 20 determines whether a person is present based on the information of the human body measured by the heat sensor 10 and generates an alarm signal A. The controller 20 can be selectively installed inside or outside the freezer 100 . In other words, the control unit 20 determines the presence of a person from the thermal image I provided from the thermal sensor 10, and generates an alarm signal A according to the determined information. For example, when a person is recognized from the thermal image I, the control unit 20 generates the alarm signal A, and conversely, if the person is not recognized from the thermal image I, the control unit 20 Does not generate the alarm signal (A). That is, the control unit 20 generates the alarm signal A only when the person resides in the freezer 100, and the generated alarm signal A is transmitted to the alarm unit 30.

The alarm unit 30 receives the alarm signal A from the control unit 20 and outputs audible or intense light in the freezer 100. At least one alarm unit 30 is installed in the freezer 100. [ The alarm unit 30 may be disposed at a position where uniform sound is uniformly transmitted to all positions in the freezer 100 and where the light is well visible. For example, the alarm unit 30 may be disposed near the center of the ceiling of the freezer 100 or near the door. The alarm unit 30 includes a speaker for outputting a tilted sound and a beacon for outputting a beep, and can adjust the intensity of the beep or light output according to the intensity of the alarm signal A transmitted from the control unit 20. [ For example, when the alarm signal A having the increased intensity is transmitted, the alarm unit 30 can increase the magnitude of the tilting or the brightness of the lightening, and output it. On the contrary, when the alarm signal A whose intensity has been reduced is transmitted, the alarm unit 30 can reduce the magnitude of the tilting or the brightness of the tungsten light and output it. The alarm unit 30 is stopped by the input unit 40 to be described later.

On the other hand, the aforementioned thermal imaging camera generates a plurality of thermal image I with a time lag, and the control unit 20 can extract the body temperature estimation region H from the plurality of thermal image I. Therefore, the control unit 20 compares the temperature of the body temperature estimation region H of the initially generated thermal image I with the temperature of the body temperature estimation region H of the thermal image I generated at a time difference, And generate the alarm signal A accordingly.

3, the controller 20 generates the alarm signal A by increasing the intensity of the alarm signal A when the body temperature is lower than the reference value.

3 (a) and 3 (b) are diagrams for comparing the temperature changes of the body temperature estimation region H extracted from the thermal image I, and FIG. 3 (b) (I) generated with a certain time lag.

3 (a), the infrared camera senses infrared rays radiated from a human body to generate an infrared image I, and the controller 20 acquires a body temperature estimation region (I) from the infrared image I H) is extracted. The operator maintains the normal body temperature immediately after entering the freezer 100, and the body temperature estimation region H extracted from the generated thermal image I at this time belongs to the normal region. In other words, in the body temperature estimation region H extracted from the initially generated thermal image I, the body temperature drop, which is the difference between the normal body temperature and the present body temperature, is detected as below the reference value. Here, the reference value of the body temperature decrease means a difference between the maximum value of the normal body temperature and the minimum value of the reference body temperature. For example, the normal body temperature refers to 36 to 37 ?, the reference body temperature refers to 35 Can mean?. When the body temperature lower than the reference value is detected, the control unit 20 does not generate the alarm signal A by decreasing the intensity or generate the alarm signal A.

3 (b), the operator's body temperature gradually decreases after a certain period of time after the worker enters the freezer 100, and the body temperature estimation (I) extracted from the generated thermal image (I) The region H belongs to the abnormal region. In other words, in the body temperature estimation region H extracted from the thermographic image I generated with the parallax, the difference between the normal body temperature and the current body temperature is varied, and the body temperature drop is detected as the reference value or more. When the body temperature is lowered beyond the reference value, the control unit 20 generates the alarm signal A by increasing the intensity of the alarm signal A.

The control unit 20 appropriately adjusts the intensity of the alarm signal A in accordance with the temperature change in the body temperature estimation region H so that the warning unit 30 outputs too much loud sound or excessively bright light, It is possible to prevent the inconvenience to be experienced during the operation. In addition, the alarm unit 30 outputs a large amount of tilting to induce a worker who has lost consciousness in the freezer 100 to look for consciousness.

The control unit 20 compares the position of the body temperature estimation region H extracted from the plurality of thermally image images I generated with a time difference to determine whether a person is moving or not. Signal A may be generated.

For example, the control unit 20 can generate the alarm signal A in five stages according to the degree of human motion. In the first stage, when the standing state is maintained, the second stage is changed from the standing state to the sitting state In the case of the step 3, the sitting state is maintained, the step 4 is changed from the sitting state to the lying state, and the step 5 may be the case where the lying state is maintained. The first stage and the second stage are separated into an initial stage, and when the degree of motion is an initial stage, the control unit 20 generates an alarm signal A whose intensity is reduced. The third stage is separated into the middle stage, and when the degree of motion is middle stage, the controller 20 generates the alarm signal A whose intensity is higher than the initial stage. The fourth and fifth steps are separated into late stages. When the degree of motion is at the late stage, the controller 20 generates an alarm signal A whose intensity is higher than that in the middle stage.

4 and 5, the controller 20 increases the strength of the alarm signal A when the movement of the person is not detected, rather than when the movement of the person is detected.

Figs. 4A and 4B and Figs. 5A and 5B are diagrams for comparing changes in the position of the body temperature estimation region H extracted from the thermal image I, (b) and Fig. 5 (b) are the thermal image (I) generated with a certain time difference from Figs. 4 (a) and 5 (a).

4 (a) shows a state in which the body temperature estimation region H extracted from the thermal image I is standing and FIG. 4 (b) shows a state in which the body temperature estimation region H is sitting do. In other words, the position between the body temperature estimation region H extracted from the thermal image I of FIG. 4 (a) and the body temperature estimation region H extracted from the thermal image I of FIG. 4 (b) So that it can be determined that an operator residing in the freezer 100 is moving. The control unit 20 generates an alarm signal A at the initial stage when the movement of the resident worker in the freezer 100 is detected, that is, as shown in the drawing, 30) reduces the magnitude of the trueness and the brightness of the light.

Next, Fig. 5 (a) shows a state in which the body temperature estimation region H extracted from the thermal image I is laid, Fig. 5 (b) . In other words, the position between the body temperature estimation region H extracted from the thermal image I of FIG. 5 (a) and the body temperature estimation region H extracted from the thermal image I of FIG. 5 (b) So that it can be determined that the worker resident in the freezer 100 is not moving. The control unit 20 generates the alarm signal A at the last stage when the movement of the resident worker in the freezer 100 is not detected, 30) increases the magnitude of the trueness and the brightness of the light.

It is possible to prevent the operator from experiencing discomfort due to tilting or lightening by controlling the intensity of the alarm signal A in accordance with the change in the position of the body temperature estimation area H Increased trueness can lead the operator to look for consciousness.

The controller 20 may generate an alarm signal A when a predetermined time elapses when a person is sensed by the heat sensor 10.

When the operation is performed for a long time in the freezer 100 at a low temperature, hypothermia may adversely affect the health of the operator. Therefore, a certain reference time is set during the operation of the freezer 100, and the reference time means a working time that does not affect the health of the worker. The control unit 20 generates an alarm signal A when a reference time elapses after a person is sensed by the heat sensor 10 and transmits the alarm signal A to the alarm unit 30 so that the alarm unit 30 outputs audible or light do. Therefore, the operator can recognize that the reference time has elapsed, and can prevent various accidents caused by working over the reference time.

The input unit 40 provides the output stop signal S to the control unit 20 to interrupt the audible or light output of the alarm unit 30 and is located inside the freezer 100. [ A plurality of the input units 40 may be installed in the freezer 100, for example, at positions closest to the doors and at the most distant positions from the doors. The input unit 40 may be formed of at least one of a pressure method in which a human being is pressed and operated and a voice recognition method in which a human voice is recognized and a signal is generated to generate an output stop signal S. [ For example, when the input unit 40 is formed in a pressurizing manner, the output stop signal S can be generated by button operation or the like. When the input unit 40 is formed by speech recognition, The output stop signal S can be generated.

The control unit 20 provides the alarm stop unit 30 with the output interrupt signal S transmitted from the input unit 40 so that the alarm unit 30 stops the output. That is, when the operator residing in the freezer 100 is conscious, the output stop signal S can be provided through the input unit 40, thereby allowing the operator to know that no problem such as an accident has occurred Able to know. On the other hand, when the operator who is inside the freezer 100 loses consciousness, the output stop signal S is not provided from the input unit 40, so that it is possible to recognize that a problem has occurred to the operator. When the output stop signal S is not provided from the input unit 40, the control unit 20 provides the alarm signal A to the external alarm unit 50 to be described later.

Further, the input unit 40 may provide the alarm signal A directly to the control unit 20. The alarm signal A can be generated through at least one of a pressure method and a voice recognition method so that an operator confined in the freezer 100 can directly request an external structure. When the input unit 40 is formed in a pressurizing manner, the button for providing the output interrupt signal S and the button for providing the alarm signal A may be separately formed. When the alarm signal A is provided from the input unit 40, the control unit 20 provides the alarm signal A to the external alarm unit 50. [

That is, when the output stop signal S is not provided from the input unit 40 or the alarm signal A is provided from the input unit 40, the control unit 20 provides the external alarm unit 50 with the alarm signal A do.

The external alarm unit 50 receives an alarm signal A from the control unit 20 and outputs audible or intense light to the outside of the freezer 100. At least one external alarm unit 50 is provided outside the freezer 100 . The external alarm unit 50 includes a speaker for outputting a tilted sound such as the alarm unit 30 and a beacon for outputting a beep light. The external alarm unit 50 is installed at a position where the beep or light can be well transmitted to an operator residing outside the freezer 100 . The external alarm unit 50 is stopped by the external input unit 60.

The external input unit 60 stops the output of the external alarm unit 50 by providing the output stop signal S to the control unit 20 and is located outside the freezer 100. [ At least one external input unit 60 may be provided outside the freezer 100, for example, at a position close to the freezer 100. The external input unit 60 may be formed of at least one of a pressure method in which a human being is pressed and operated and a voice recognition method in which a human voice is recognized by operating the input unit 40 to generate an output stop signal S. [

The control unit 20 provides the external alarm unit 50 with the output interrupt signal S transmitted from the external input unit 60 so that the external alarm unit 50 stops the output. That is, the worker residing outside the freezer 100 does not receive the output interruption signal S from the worker residing in the freezer 100, or the alarm signal A is input to the external alarm part 50, The external alarm unit 50 stops the output of the external alarm unit 50 by providing an output interrupt signal S to the external input unit 60. [

Hereinafter, the operation of the freezer alarm system 1 will be described in more detail with reference to FIG.

6 is a flowchart for explaining the operation of the freezer alarm system of FIG.

The freezer alarm system 1 according to an embodiment of the present invention may include a heat sensing sensor 10 installed inside the freezer 100 to determine the presence or absence of an operator in the freezer 100, It is possible to output an audible or light signal to the outside. Accordingly, regardless of the conscious state of the worker trapped in the freezer 100, whether or not the worker is confined can be recognized from the outside of the freezer 100, so that the worker can be safely rescued.

When the worker enters the freezer 100, the infrared camera of the thermal sensor 10 senses the infrared rays radiated from the human body to generate the infrared image I (S100), and generates the generated infrared image I To the control unit 20. The control unit 20 analyzes the transferred thermal image I to determine whether there is a person or not in operation S110 and generates an alarm signal A when a person is recognized from the thermal image I, (S120). At this time, the control unit 20 compares the temperature of the body temperature estimation region H extracted from the plurality of thermally image images I generated with a time difference to determine whether or not the body temperature is lowered. Can be generated by increasing the strength of the alarm signal (A). In addition, the control unit 20 compares the positions of the body temperature estimation regions H extracted from the plurality of thermally image images I generated with a time difference to determine whether a person is moving, An alarm signal A may be generated. The controller 20 may generate an alarm signal A when a predetermined time elapses when a person is sensed by the heat sensor 10. The alarm unit 30 receives the alarm signal A from the control unit 20 and outputs audible or intense light to the freezer 100 at step S130. The alarm unit 30 receives the alarm signal A, Can be adjusted.

The operator who resides in the freezer 100 provides the output stop signal S through the input unit 40 in the form of a pressurizing method or a voice recognition method in step S140, The output stop signal S provided from the control unit 40 to the alarm unit 30 to stop the output of the alarm unit 30 at step S150.

If there is a problem with the operator residing in the freezer 100, the output stop signal S is not provided through the input unit 40. At this time, the control unit 20 generates the alarm signal A To the external alarm unit 50 (S141). The external alarm unit 50 receives an alarm signal A from the control unit 20 and outputs an audible sound or a light signal to the outside of the freezer unit 10 in operation S142 so that an operator residing outside the freezer unit 100 It is possible to proceed with the structure of the operator confined in the freezer 100 (S143). The operator residing outside the freezer 100 provides the output interruption signal S to the external input unit 60 before or after the structure S144 to stop the output of the external alarm unit 50 at S145, After the entry, the output stop signal S is also provided to the input unit 40 (S146), and the output of the alarm unit 30 is stopped.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

1: Freezer alarm system 10: Thermal sensor
20: control unit 30: alarm unit
40: input unit 50: external alarm unit
60: external input unit 100: freezer
A: Alarm signal H: Body temperature estimation area
I: Thermal image S: Output stop signal

Claims (9)

A heat sensing sensor located inside the freezer and sensing human body heat;
A controller for determining the presence or absence of a person through information on a human body measured by the heat sensor and generating an alarm signal;
An alarm unit for receiving the alarm signal from the control unit and outputting audible or intense light in the freezer; And
And an input unit disposed in the freezer and providing an output stop signal to stop the output of the audible or light signal to the control unit. The freezer alarm system according to claim 1, wherein the thermal sensor is an infrared camera that detects infrared rays to generate a thermal image, and the controller determines presence or absence of a person from the thermal image. 3. The method of claim 2, wherein the thermal imaging camera produces a plurality of thermal images with a time lag,
Wherein the controller extracts a body temperature estimation region from the plurality of thermal image images and compares the temperature of the body temperature estimation region of the thermal image generated at a time difference with the body temperature estimation region of the first generated thermal image, And the alarm signal is generated. The freezer alarm system of claim 3, wherein the controller generates the alarm signal by increasing the intensity of the alarm signal when a body temperature lower than a reference value is sensed. 3. The method of claim 2, wherein the thermal imaging camera produces a plurality of thermal images with a time lag,
Wherein the controller extracts a body temperature estimation region from the plurality of thermal image images, compares positions of the body temperature estimation region extracted from the plurality of thermal image images to determine whether a person is moving, And generates the alarm signal. The freezer alarm system of claim 5, wherein the control unit increases the intensity of the alarm signal when the movement of the person is not detected when the motion of the person is not detected. The freezer alarm system according to claim 1, wherein the controller generates the alarm signal when a reference time elapses when a person is sensed by the heat sensor. 2. The refrigerator according to claim 1, further comprising an external alarm unit for receiving the alarm signal from the controller and outputting an audible or light signal to the outside of the freezer,
Wherein the control unit provides the alarm signal to the external alarm unit when the output interrupt signal is not provided from the input unit. The freezer alarm system according to claim 1, wherein the input unit is formed of at least one of a pressure method in which a person presses and operates, and a voice recognition method in which a voice is recognized to generate a signal.

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